79605181578 has 128 divisors (see below), whose sum is σ = 178036992000. Its totient is φ = 23570300160.

The previous prime is 79605181571. The next prime is 79605181589. The reversal of 79605181578 is 87518150697.

It is not an unprimeable number, because it can be changed into a prime (79605181571) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 159529173 + ... + 159529671.

It is an arithmetic number, because the mean of its divisors is an integer number (1390914000).

Almost surely, 2^79605181578 is an apocalyptic number.

79605181578 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 79605181578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89018496000).

79605181578 is an abundant number, since it is smaller than the sum of its proper divisors (98431810422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79605181578 is a wasteful number, since it uses less digits than its factorization.

79605181578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052.

The product of its (nonzero) digits is 4233600, while the sum is 57.

The spelling of 79605181578 in words is "seventy-nine billion, six hundred five million, one hundred eighty-one thousand, five hundred seventy-eight".